Bead trimmer



Dec. 7 1926. 1,610,048

F. H. GROVE BEAD TRIMMER Filed March l5, 1922 3 Sheets-Sheet-1 Dec. 7 1926.

F. H. GROVE BEAD TRIMMER Filed March 15. 1922 3 Sheets-Sheet 2 F. H. GROVE BEAD TRIMMER Filed March l5, 1922 3 Sheets-Sheet 5 Patented Dec. 7, 1926.4

FRANK H. GROVE, F COLUMBIANA, OHIO.

BEAD TRIMMER.

Application lecv'March 13, 1922. Serial No. 543,446.'

This invention relates to bead.; trimmers and has more especial reference to a device designed to accurately trim the edges ofthe rubber bead strips used in the construction of pneumatic tire casings.

n forming the rubber bead strips, a iin is usually formed upon each side of the strip and the objects of the present invention are to provide means for quickly and accurately trimming these fins from'the strip.

The above and other objects may be attained by providing a device such as illastrated in the accompanying drawings, in widengure 1 is a front elevation of a bead device embodying the invention, p .rts b ne; broken vaway for the purpose of illustration:

Fig'. 2, a side elevation of the same;

3, a section approximately on the line 3--3, Fig. 1;

Fiat. 4, a fragmentary elevation of the cuting disks, showing portions of the guide roll and drive roll; and

F ig. 5, a fragmentary perspective of a yportion of a bead strip before trimming.

Similar numerals refer to similar parts throughout the drawings.

The device includes a housing or frame 1., mounted upon the supports 2, the motor 3 being supported therein beneath the frame as by the shelf 4. A pinion 5 upon the motor shaft mesheswith the gear 6 mounted upon a shaft 7 journaled in suitable bearin :fs 8 provided in the housing 1 and provided aU its opposite end with a pinion 9 which meshes with the gear 10 formed integral with a pinion 11 and journaled upon the stud shaft 12.

The pinion 11 meshes with a gear 13 upon the neck 14 of the drive roll 15. The drive roll is journaled in bearings 16 located upon the top of the frame 1 and against the rear wall 17 thereof, being attached to the frame as by the screws 18. y

A dovetailed guideway 19 is formed upon the rear side of the wall 17, upon which is mounted a pair of sliding blocks 20, each of which is adjustable upon the guideway by means of an adjusting screw 21.

Each of the blocks 20 has at its upper end, frwardly projecting bearing portlQIl 22', a-lugv23 protrudingI forwardly from the each rod 24 between the thumb nut thereonV and the plate 29, tending to normally urge the bracket 26 downward.

Each of the brackets 26 is provided at its forward end with the bearing 31 upon which is journaled a cutting disk 32, an eccentric 33 being mounted upon the shaft 34 of the disk 32 and arranged to be normally located in the position shown in Fig. 3y engading? the stop pin and allowing,` the cutting disk to engage the roll 15.

A bracket 36 is supported upon the rear side of the frame 1, the frame 37 beine; hinged to the upper end thereof as it 38, said frame being provided with a counterweight 39 and with the bearing 40 within which is located the shaft 41 upon which the guide wheel is journaled,

The peripheral contour of the guide wheel conforms tothe bead strip 43 and it will be understood that the guide wheel may be replaced by another having a different contour to accommodate any crosssectional shape of bead strip. The guide wheel may be easily removed from its shaft by removal of the nut 44.

A bracket 45 is mounted upon the forward side of the frame and provided with the guiding rollers 46 and 47. the roller 46 being journaled upon a fixed post 48, the roll 47 being journaled upon a post 49 which is mounted in the slidable plunger 50 located in the channel portion 51 of the bracket and :provided with the reduced shank 52 extending through one side 0f the bracket, a coil spring 53 being interposed between the end of the bracket and the collar 54 upon the shank for normally urging the roller 47 toward the roller 46.

In operating the device, the bead strip 43 is passed between the guide rollers 46 and 47 and between the guide Wheel 42 and the feed roller 15, the cutting disk 32 severing the fins 55 from the bead strip, as shown in Fig. 4:.

I claim l. A bead trimmer including a frame, a cylindrical drive roll mounted therein, a pair of spaced cutting disks engaging the periphery of the drive roll, and means for passing the bead strip between the cutting disks and drive roll, means for moving the cutting disks laterally and an eccentric adjacent to each cutting disk for raising the same out of engagement with the drive roll.

2. A bead trimmer including a rotatable cylindrical drive roll, a pair of spaced cut- Leionee ting disks engaging the periphery of the drive roll and pressure means fon holding the peripheral cutting edges of the disks against the drive roll.

3. A head trimmer including aframe a cylindrical drive roll mounted tliereim a pair of spaced cutting disks engaging the periphery of the drive roll, means for passing the bead strip between the cutting disks and drive roll, means for moving the cutting disks laterally and means adjacent to each cutting disk for raising the same out of engagement with the drive roll` FRANK H. enovn. 

